1 files changed, 2 insertions, 0 deletions
diff --git a/tests/ttanh.c b/tests/ttanh.c
index 5985163ee..a9eb8c658 100644
--- a/tests/ttanh.c
+++ b/tests/ttanh.c
@@ -130,6 +130,8 @@ main (int argc, char *argv[])
   test_generic (2, 100, 100);
 
   data_check ("data/tanh", mpfr_tanh, "mpfr_tanh");
+  bad_cases (mpfr_tanh, mpfr_atanh, "mpfr_tanh", 256, -128, 0,
+             4, 128, 800, 100);
 
   tests_end_mpfr ();
   return 0;